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HD 9227


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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.

GPM - compiled catalogue of absolute proper motions of stars in selected areas of sky with galaxies.
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Osservazione e dati astrometrici

Costellazione:Balena
Ascensione retta:01h30m44.85s
Declinazione:-08°04'09.4"
Magnitudine apparente:7.951
Distanza:244.499 parsec
Moto proprio RA:-9.8
Moto proprio Dec:-5.6
B-T magnitude:9.36
V-T magnitude:8.068

Cataloghi e designazioni:
Nomi esatti
HD 1989HD 9227
TYCHO-2 2000TYC 5274-69-1
USNO-A2.0USNO-A2 0750-00352486
HIPHIP 7038
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